---
title: "Generating UUIDs | Grafana k6 documentation"
description: "Scripting example on how to generate UUIDs in your load test."
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# Generating UUIDs

If you want to make a version 4 UUID, you can use the [`uuidv4` function](/docs/k6/latest/javascript-api/jslib/utils/uuidv4/) from the [k6 JS lib repository](https://jslib.k6.io/).

JavaScript ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```javascript
import { uuidv4 } from 'https://jslib.k6.io/k6-utils/1.4.0/index.js';

export default function () {
  const randomUUID = uuidv4();
  console.log(randomUUID); // 35acae14-f7cb-468a-9866-1fc45713149a
}
```

If you really need other UUID versions, you must rely on an external library.

## Generate v1 UUIDs

As k6 doesn’t have built-in support for version 1 UUID, you’ll have to use a third-party library.

This example uses a Node.js library called [uuid](https://www.npmjs.com/package/uuid) and [Browserify](http://browserify.org/) (to make it work in k6). For this to work, we first need to go through a few required steps:

1. Make sure you have the necessary prerequisites installed: [Node.js](https://nodejs.org/en/download/) and [Browserify](http://browserify.org/)
2. Install the `uuid` library:
   
   Bash ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy
   
   ```bash
   npm install uuid@3.4.0
   ```
3. Run it through browserify:
   
   Bash ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy
   
   ```bash
   browserify node_modules/uuid/index.js -s uuid > uuid.js
   ```
4. Move the `uuid.js` file to the same folder as your script file. Now you can import it into your test script:
   
   JavaScript ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy
   
   ```javascript
   import uuid from './uuid.js';
   ```

This example generates a v1 UUID:

JavaScript ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```javascript
import uuid from './uuid.js';

export default function () {
  // Generate a UUID v1
  const uuid1 = uuid.v1();
  console.log(uuid1);
}
```